Esab Cryo-Shield 308L description: Cryo-Shield 308L is an all-position wire adaptable to a variety of shop and field erection applications. The use of argon/CO2 gas shielding is recommended for maximum toughness. Designed for cryogenic applications where good weld metal toughness is required. Applications include cryogenic vessel fabrication and process piping repair. Cyro-Shield 308L is guaranteed to produce a minimum of 15mils lateral expansion at -320F.